pidgin security, bug fix, and enhancement update

2.10.11-5 - Drop MXit support in RHEL Resolves: 1439296 2.10.11-4 - Silence -Wsign-compare - Rename the previous patch for consistency Resolves: 1445921, 1446368 2.10.11-3 - Avoid a use-after-free in an error path Resolves: 1445921 2.10.11-2 - Add patch for CVE-2017-2640 Resolves: 1431022 2.10.11...